EP1138369A1 - Process for removing carbon dioxide from gas turbine exhaust gas and apparatus for conducting the process - Google Patents

Process for removing carbon dioxide from gas turbine exhaust gas and apparatus for conducting the process Download PDF

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Publication number
EP1138369A1
EP1138369A1 EP01107359A EP01107359A EP1138369A1 EP 1138369 A1 EP1138369 A1 EP 1138369A1 EP 01107359 A EP01107359 A EP 01107359A EP 01107359 A EP01107359 A EP 01107359A EP 1138369 A1 EP1138369 A1 EP 1138369A1
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EP
European Patent Office
Prior art keywords
carbon dioxide
exhaust gas
desorber
absorber
gas turbine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01107359A
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German (de)
French (fr)
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EP1138369B1 (en
Inventor
Jürgen Dr. Baum
Armin Schimkat
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General Electric Technology GmbH
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Alstom Technology AG
Alstom Power NV
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Publication of EP1138369A1 publication Critical patent/EP1138369A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/006—Layout of treatment plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/20—Intercepting solids by baffles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/50—Intercepting solids by cleaning fluids (washers or scrubbers)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/60—Sorption with dry devices, e.g. beds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/70—Condensing contaminants with coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
    • F23L2900/15042—Preheating combustion air by auxiliary combustion, e.g. in a turbine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/32—Direct CO2 mitigation

Definitions

  • the present invention relates to the fields of power plant technology which include the operation of a gas turbine, for example combined cycle power plants. It relates to a method and a device according to the preamble of Claim 1 and claim 6.
  • the object is achieved by the entirety of the features of claims 1 and 6.
  • the essence of the invention is to remove the carbon dioxide a high temperature level even before the heat recovery process and remove one with an absorbent coating equipped rotating, regenerative absorber / desorber works between the exhaust gas flow and a separate carbon dioxide cycle.
  • the carbon dioxide cycle is easily compared to the Absorption side reaches an elevated temperature level, which leads to the release of the absorbed carbon dioxide in the absorber / desorber is necessary.
  • the temperature difference between the absorption and desorption side of the Absorbers / desorbers can be enlarged further if according to another Continuing the process of heat recovery from a water / steam cycle with a waste heat boiler, and the exhaust gas after the Heat transfer to the carbon dioxide cycle and before entering the absorber / desorber used to overheat steam in the water / steam cycle becomes.
  • the carbon dioxide cycle finally becomes the one removed from the exhaust gas Partial stream corresponding to carbon dioxide is branched off and then cooled.
  • a preferred embodiment of the device according to the invention is distinguished characterized in that between the gas turbine system and the absorber / desorber a first heat exchanger is arranged, which with the carbon dioxide cycle communicates that the heat recovery means a water / steam cycle with a waste heat boiler, and that between the first Heat exchanger and the absorber / desorber a second heat exchanger for overheating the steam is arranged in the water / steam cycle.
  • the absorber / desorber is preferred in the manner of a coated Ljungström heat exchanger built and with a large reactive surface for the Absorption and desorption of carbon dioxide equipped, reducing the heat transfer between the carbon dioxide cycle and the absorption side the carrier material carrying the coating or one between the reactive coating of the absorber / desorber and the carrier material arranged intermediate layer has a low thermal conductivity.
  • Figure 1 shows the scheme of a preferred embodiment for a device according to the invention in the form of a combined cycle power plant
  • Figure 2 illustrates a detail of the Absorbers / desorbers.
  • FIG. 1 the system diagram of a combined cycle power plant 10 with a Device for removing carbon dioxide from the exhaust gas shown.
  • the Combined power plant 10 essentially comprises three plant parts, namely a gas turbine plant 11, a water / steam cycle 12 and a carbon dioxide cycle 38, all of which are coupled together.
  • the gas turbine system 11 comprises a compressor 14, a first combustion chamber 15 and a gas turbine 16.
  • the compressor sucks combustion air via an air supply 18 on, it condenses.
  • the compressed air becomes a combustion (Liquid or gaseous) fuel used in the first combustion chamber 15.
  • the hot gas generated during the combustion is in the gas turbine 16 relaxed, which drives the compressor 14 via a common rotor and a connected first generator 13 generates electricity.
  • the exhaust 39 from after passing through several intermediate stages (19, 20, 21, 22), which will be discussed in more detail below, by an in Water / steam cycle 12 lying waste heat boiler (Heat Recovery Steam Generator HRSG) 33 sent where 40 heat is recovered from the exhaust gas and is used to generate steam.
  • HRSG Heat Recovery Steam Generator
  • feed water In the waste heat boiler 33 is feed water, which is by means of a feed water pump 31 is pumped up from a feed water boiler / deaerator 30 in an economizer 34 preheated, then in one with a steam drum 32 connected evaporators 35 evaporated and then in a superheater 36 overheated.
  • the live steam is expanded in a steam turbine 29, condensed in a subsequent condenser 27 and by means of a condensate pump 26 pumped back into the feed water boiler / deaerator 30.
  • the Steam turbine 29, which usually comprises several pressure stages, drives one second generator 28, but can also be coupled to the gas turbine 16.
  • the exhaust gas 39 coming from the gas turbine 16 contains carbon dioxide With the help of system parts 19-25 and 37, 38 removed from the exhaust gas and separately is processed further.
  • the carbon dioxide circuit 38 is located on a significantly higher temperature than the exhaust gas 40 flowing to the waste heat boiler 33.
  • the exhaust gas 39 is initially in a after leaving the gas turbine 16 second combustion chamber 19 which, like the first combustion chamber 15, has a Fuel supply 17 is supplied with fuel, heated. The one with it associated temperature increase enables in a subsequent first Heat exchanger 20 sufficient heat transfer from the exhaust gas 39 to the Carbon dioxide cycle 38. It should be noted at this point that in future Second generation gas turbine generations with even higher outlet temperatures Combustion chamber 19 can possibly be dispensed with.
  • regenerative absorber / desorber 22 occurs, that is Exhaust gas 39 in a second heat exchanger 21, which is used to further overheat the Steam in the water / steam circuit 12 is used, further cooled.
  • the carbon dioxide contained in the exhaust gas 39 on a absorbing reactive absorber surface 42 at a lower temperature then rotates about the axis of rotation 23 to the side of the carbon dioxide circuit 38 and is desorbed there at the elevated temperatures.
  • the absorber / desorber 22 is preferably coated Ljungström heat exchanger built. Its essential elements are one around a rotation axis 23 rotating support structure 41 coated with a large surface area reaction material 42 for absorption and Desorption of carbon dioxide and possibly an insulating one Intermediate layer 43. Such devices are known per se (see e.g. the Documents US-A-3,865,924 or US-A-5,464,468 or US-A-4,778,492).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Treating Waste Gases (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Separation Of Gases By Adsorption (AREA)

Abstract

Process for removing carbon dioxide from the waste gas (39) produced from a gas turbine (11) comprises removing the carbon dioxide from the waste gas between the gas turbine and the heat recovery process using a rotating regenerative absorber/desorber (22) which is connected to the absorber side in the waste gas stream and to the desorber side in a carbon dioxide cycle (38). An Independent claim is also included for an apparatus for carrying out the process. Preferred Features: Heat from the waste gas is carried to the carbon dioxide cycle between the gas turbine and the absorber/desorber. The heat recovery process comprises a water/vapor cycle (12) with a boiler (33). The waste gas is used after the heat transfer to the carbon dioxide cycle and before the inlet to the absorber/desorber to super heat the vapor in the water/vapor cycle.

Description

Die vorliegende Erfindung bezieht sich auf die Gebiete der Kraftwerkstechnik, die den Betrieb einer Gasturbine einschliessen, beispielsweise Kombi-Kraftwerke. Sie betrifft ein Verfahren und eine Vorrichtung gemäss dem Oberbegriff des Anspruchs 1 bzw. des Anspruchs 6.The present invention relates to the fields of power plant technology which include the operation of a gas turbine, for example combined cycle power plants. It relates to a method and a device according to the preamble of Claim 1 and claim 6.

Ein solches Verfahren und eine solche Vorrichtung sind z.B. aus der Druckschrift US-A-5,832,712 bekannt. Such a method and such an apparatus are e.g. from the publication US-A-5,832,712.

STAND DER TECHNIKSTATE OF THE ART

Im Zuge der zunehmenden Diskussion über mögliche Klimaveränderungen durch das Ansteigen der Kohlendioxidkonzentration in der Erdatmosphäre ("Treibhauseffekt"), das vor allem auf das Verbrennen fossiler Brennstoffe wie Erdgas, Erdöl und Kohle zurückzuführen ist, werden zunehmend auch Vorschläge unterbreitet, wie beispielsweise bei fossil befeuerten Kraftwerken aus den Rauchgasen des Kessels bzw. Abgasen von Gasturbinenanlagen das Kohlendioxid in grosstechnischem Massstab entfernt werden kann, bevor es in die Atmosphäre entlassen wird.In the course of the increasing discussion about possible climate changes the increase in the carbon dioxide concentration in the earth's atmosphere ("greenhouse effect"), this is mainly due to the burning of fossil fuels such as natural gas and oil and coal can be traced, proposals are increasingly being made such as fossil-fired power plants from the flue gases of the Boilers or exhaust gases from gas turbine plants produce the carbon dioxide on an industrial scale Scale can be removed before it is released into the atmosphere becomes.

Einer dieser Vorschläge ist in der US-A-5,344,627 beschrieben. Dort wird das Rauchgas aus dem fossil befeuerten Kessel eines Dampfkraftwerkes im Gegenstrom mit einer Kohlendioxid absorbierenden Flüssigkeit in Kontakt gebracht, die beispielsweise ein Alkanolamin enthält. Das von der Flüssigkeit aufgenommene Kohlendioxid wird an einer anderen Stelle des Flüssigkeitskreislaufes wieder aus der Flüssigkeit entfernt und anschliessend verflüssigt. Der Flüssigkeitskreislauf mit den notwendigen Absorptions- und Regenerationssäulen erfordert einen erheblichen anlagentechnischen Aufwand.One of these proposals is described in US-A-5,344,627. There it will Flue gas from the fossil-fired boiler of a steam power plant in counterflow contacted with a carbon dioxide absorbing liquid which contains, for example, an alkanolamine. The one absorbed by the liquid Carbon dioxide is released at another point in the liquid cycle removed the liquid and then liquefied. The liquid cycle with the necessary absorption and regeneration columns require a considerable amount plant engineering effort.

Ein anderer aus der US-A5,665,319 bekannter Vorschlag zur Entfernung von Kohlendioxid aus einem kohlendioxidhaltigen Gas verwendet anstelle einer Flüssigkeit ein körniges Metalloxid, das durch Aufnahme von Kohlendioxid in ein Metallkarbonat umgewandelt und durch späteres Entfernen von Kohlendioxid wieder in das Metalloxid zurückverwandelt wird. Das körnige Pulver wird dabei entweder in einem Kreislauf zwischen einem Fixationsturm und einem Zerlegungsofen hinund herbefördert, oder es werden zwei gleichartige Vorrichtungen mit einem festen Pulverbett eingesetzt, die durch Umschalten abwechselnd zur Aufnahme und Abgabe des Kohlendioxids eingesetzt werden. Nachteilig ist bei diesem Verfahren, dass die Vorrichtung, in der das Kohlendioxid wieder abgespalten wird, jeweils als fremdgeheizter Ofen betrieben werden muss.Another proposal known from US-A5,665,319 for the removal of Carbon dioxide from a carbon dioxide gas is used instead of a liquid a granular metal oxide created by the absorption of carbon dioxide in a metal carbonate converted and again by later removing carbon dioxide is converted back into the metal oxide. The granular powder is either in a circuit between a fixation tower and a disassembly furnace conveyed, or there are two similar devices with a fixed Powder bed used, which alternately for recording and switching Release of the carbon dioxide can be used. The disadvantage of this method is that that the device in which the carbon dioxide is split off again as externally heated oven must be operated.

In der eingangs genannten Druckschrift US-A-5,832,712 schliesslich wird vorgeschlagen, das Kohlendioxid aus dem Abgas einer Gasturbinenanlage zu entfernen, indem das Abgas nach dem Durchlaufen eines Abhitzekessels in einer Absorptionsäule mit einer Kohlendioxid absorbierenden Flüssigkeit in Kontakt gebracht wird. Auch hier ergibt sich als Nachteil der anlagentechnische Aufwand für den Flüssigkeitskreislauf der absorbierenden Flüssigkeit.Finally, in the document US-A-5,832,712 mentioned at the beginning it is proposed that to remove the carbon dioxide from the exhaust gas of a gas turbine plant, the exhaust gas after passing through a waste heat boiler in an absorption column contacted with a carbon dioxide absorbing liquid becomes. Here, too, there is a disadvantage in terms of system engineering the fluid circuit of the absorbent fluid.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Es ist daher Aufgabe der Erfindung, ein Verfahren und eine Vorrichtung anzugeben, die auf einfache Weise ein Entfernen von Kohlendioxid aus dem Abgas einer Gasturbinenanlage ermöglichen, wobei das Abgas im weiteren Verlauf einem Wärmerückgewinnungsprozess unterworfen wird.It is therefore an object of the invention to provide a method and a device which simply removes carbon dioxide from the exhaust gas Allow gas turbine plant, the exhaust gas in the further course Heat recovery process is subjected.

Die Aufgabe wird durch die Gesamtheit der Merkmale der Ansprüche 1 und 6 gelöst. Der Kern der Erfindung besteht darin, die Entfernung des Kohlendioxids auf einem hohen Temperaturniveau bereits vor dem Wärmerückgewinnungsprozess vorzunehmen und für das Entfernen einen mit einer absorbierenden Beschichtung ausgestatteten rotierenden, regenerativen Absorber/Desorber einzusetzen, der zwischen dem Abgasstrom und einem separaten Kohlendioxidkreislauf arbeitet.The object is achieved by the entirety of the features of claims 1 and 6. The essence of the invention is to remove the carbon dioxide a high temperature level even before the heat recovery process and remove one with an absorbent coating equipped rotating, regenerative absorber / desorber works between the exhaust gas flow and a separate carbon dioxide cycle.

Eine erste bevorzugte Ausgestaltung des erfindungsgemässen Verfahrens ist dadurch gekennzeichnet, dass zwischen der Gasturbinenanlage und dem Absorber/Desorber Wärme vom Abgas auf den Kohlendioxidkreislauf übertragen wird. Hierdurch wird im Kohlendioxidkreislauf auf einfache Weise ein gegenüber der Absorptionsseite erhöhtes Temperaturniveau erreicht, das zur Freisetzung des absorbierten Kohlendioxids im Absorber/Desorber notwendig ist. This is a first preferred embodiment of the method according to the invention characterized that between the gas turbine plant and the absorber / desorber Heat is transferred from the exhaust gas to the carbon dioxide cycle. As a result, the carbon dioxide cycle is easily compared to the Absorption side reaches an elevated temperature level, which leads to the release of the absorbed carbon dioxide in the absorber / desorber is necessary.

Der Temperaturunterschied zwischen der Absorptions- und Desorptionsseite des Absorbers/Desorbers kann weiter vergrössert werden, wenn gemäss einer anderen Weiterbildung des Verfahrens der Wärmerückgewinnungsprozess einen Wasser/Dampf-Kreislauf mit einem Abhitzekessel umfasst, und das Abgas nach der Wärmeübertragung auf den Kohlendioxidkreislauf und vor dem Eintritt in den Absorber/Desorber zur Ueberhitzung von Dampf im Wasser/Dampf-Kreislauf verwendet wird.The temperature difference between the absorption and desorption side of the Absorbers / desorbers can be enlarged further if according to another Continuing the process of heat recovery from a water / steam cycle with a waste heat boiler, and the exhaust gas after the Heat transfer to the carbon dioxide cycle and before entering the absorber / desorber used to overheat steam in the water / steam cycle becomes.

Ist die Temperatur des Abgases beim Austritt aus der Gasturbine der Gasturbinenanlage für die Aufheizung des Kohlendioxidkreislaufes nicht ausreichend, ist es zweckmässig, das Abgas vor der Wärmeübertragung auf den Kohlendioxidkreislauf zusätzlich aufzuheizen.Is the temperature of the exhaust gas when exiting the gas turbine of the gas turbine system is not sufficient for heating the carbon dioxide cycle it is expedient to exhaust the exhaust gas before the heat transfer to the carbon dioxide cycle additionally heat up.

Aus dem Kohlendioxidkreislauf wird schliesslich ein dem aus dem Abgas entfernten Kohlendioxid entsprechender Teilstrom abgezweigt und anschliessend abgekühlt.The carbon dioxide cycle finally becomes the one removed from the exhaust gas Partial stream corresponding to carbon dioxide is branched off and then cooled.

Eine bevorzugte Ausgestaltung der Vorrichtung nach der Erfindung zeichnet sich dadurch aus, dass zwischen der Gasturbinenanlage und dem Absorber/Desorber ein erster Wärmetauscher angeordnet ist, welcher mit dem Kohlendioxidkreislauf in Verbindung steht, dass die Wärmerückgewinnungsmittel einen Wasser/Dampf-Kreislauf mit einem Abhitzekessel umfassen, und dass zwischen dem ersten Wärmetauscher und dem Absorber/Desorber ein zweiter Wärmetauscher zur Ueberhitzung des Dampfes im Wasser/Dampf-Kreislauf angeordnet ist.A preferred embodiment of the device according to the invention is distinguished characterized in that between the gas turbine system and the absorber / desorber a first heat exchanger is arranged, which with the carbon dioxide cycle communicates that the heat recovery means a water / steam cycle with a waste heat boiler, and that between the first Heat exchanger and the absorber / desorber a second heat exchanger for overheating the steam is arranged in the water / steam cycle.

Bevorzugt ist der Absorber/Desorber nach Art eines beschichteten Ljungström-Wärmetauschers aufgebaut und mit einer grossen reaktiven Oberfläche für die Absorption und Desorption von Kohlendioxid ausgestattet, wobei zur Verringerung der Wärmeübertragung zwischen dem Kohlendioxidkreislauf und der Absorptionsseite das die Beschichtung tragende Trägermaterial oder eine zwischen der reaktiven Beschichtung des Absorbers/Desorbers und dem Trägermaterial angeordnete Zwischenschicht eine geringe Wärmeleitfähigkeit aufweist. The absorber / desorber is preferred in the manner of a coated Ljungström heat exchanger built and with a large reactive surface for the Absorption and desorption of carbon dioxide equipped, reducing the heat transfer between the carbon dioxide cycle and the absorption side the carrier material carrying the coating or one between the reactive coating of the absorber / desorber and the carrier material arranged intermediate layer has a low thermal conductivity.

Weitere Ausführungsformen ergeben sich aus den abhängigen Ansprüchen.Further embodiments result from the dependent claims.

KURZE ERLÄUTERUNG DER FIGURENBRIEF EXPLANATION OF THE FIGURES

Die Erfindung soll nachfolgend anhand von Ausführungsbeispielen im Zusammenhang mit den Zeichnungen näher erläutert werden. Figur 1 zeigt das Schema eines bevorzugten Ausführungsbeispiels für eine Vorrichtung nach der Erfindung in der Gestalt eines Kombikraftwerkes, Figur 2 veranschaulicht ein Detail des Absorbers/Desorbers.In the following, the invention will be described in connection with exemplary embodiments are explained in more detail with the drawings. Figure 1 shows the scheme of a preferred embodiment for a device according to the invention in the form of a combined cycle power plant, Figure 2 illustrates a detail of the Absorbers / desorbers.

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS OF CARRYING OUT THE INVENTION

In der Figur 1 ist das Anlagenschema eines Kombikraftwerkes 10 mit einer Vorrichtung zur Entfernung vom Kohlendioxid aus dem Abgas dargestellt. Das Kombikraftwerk 10 umfasst im wesentlichen drei Anlagenteile, nämlich eine Gasturbinenanlage 11, einen Wasser/Dampf-Kreislauf 12 und einen Kohlendioxidkreislauf 38, die alle miteinander gekoppelt sind.In Figure 1, the system diagram of a combined cycle power plant 10 with a Device for removing carbon dioxide from the exhaust gas shown. The Combined power plant 10 essentially comprises three plant parts, namely a gas turbine plant 11, a water / steam cycle 12 and a carbon dioxide cycle 38, all of which are coupled together.

Die Gasturbinenanlage 11 umfasst einen Verdichter 14, eine erste Brennkammer 15 und eine Gasturbine 16. Der Verdichter saugt über eine Luftzuführung 18 Verbrennungsluft an, verdichtet sie. Die verdichtete Luft wird zur Verbrennung eines (flüssigen oder gasförmigen) Brennstoffes in der ersten Brennkammer 15 verwendet. Das bei der Verbrennung entstehende Heissgas wird in der Gasturbine 16 entspannt, die über einen gemeinsamen Rotor den Verdichter 14 antreibt und über einen angeschlossenen ersten Generator 13 Strom erzeugt. Das Abgas 39 aus der Gasturbine 15 wird nach Durchlaufen mehrerer Zwischenstufen (19, 20, 21, 22), auf die weiter unten noch näher eingegangen wird, durch einen im Wasser/Dampf-Kreislauf 12 liegenden Abhitzekessel (Heat Recovery Steam Generator HRSG) 33 geschickt, wo aus dem Abgas 40 Wärme zurückgewonnen und zur Erzeugung von Dampf verwendet wird. Im Rahmen der Erfindung kann anstelle des Abhitzekessels 33 bzw. des Wasser/Dampf-Kreislaufes 12 aber auch ein anderer Wärmerückgewinnungsprozess vorgesehen sein.The gas turbine system 11 comprises a compressor 14, a first combustion chamber 15 and a gas turbine 16. The compressor sucks combustion air via an air supply 18 on, it condenses. The compressed air becomes a combustion (Liquid or gaseous) fuel used in the first combustion chamber 15. The hot gas generated during the combustion is in the gas turbine 16 relaxed, which drives the compressor 14 via a common rotor and a connected first generator 13 generates electricity. The exhaust 39 from after passing through several intermediate stages (19, 20, 21, 22), which will be discussed in more detail below, by an in Water / steam cycle 12 lying waste heat boiler (Heat Recovery Steam Generator HRSG) 33 sent where 40 heat is recovered from the exhaust gas and is used to generate steam. Within the scope of the invention but instead of the waste heat boiler 33 or the water / steam circuit 12 another heat recovery process may be provided.

Im Abhitzekessel 33 wird Speisewasser, welches mittels einer Speisewasserpumpe 31 aus einem Speisewasserkessel/Deaerator 30 herangepumpt wird in einem Economizer 34 vorgewärmt, anschliessend in einem mit einer Dampftrommel 32 verbundenen Verdampfer 35 verdampft und anschliessend in einem Ueberhitzer 36 überhitzt. Der Frischdampf wird in einer Dampfturbine 29 entspannt, in einem nachfolgenden Kondensator 27 kondensiert und mittels einer Kondensatpumpe 26 in den Speisewasserkessel/Deaerator 30 zurückgepumpt. Die Dampfturbine 29, die üblicherweise mehrere Druckstufen umfasst, treibt einen zweiten Generator 28 an, kann aber auch mit der Gasturbine 16 gekoppelt sein.In the waste heat boiler 33 is feed water, which is by means of a feed water pump 31 is pumped up from a feed water boiler / deaerator 30 in an economizer 34 preheated, then in one with a steam drum 32 connected evaporators 35 evaporated and then in a superheater 36 overheated. The live steam is expanded in a steam turbine 29, condensed in a subsequent condenser 27 and by means of a condensate pump 26 pumped back into the feed water boiler / deaerator 30. The Steam turbine 29, which usually comprises several pressure stages, drives one second generator 28, but can also be coupled to the gas turbine 16.

Das aus der Gasturbine 16 kommende Abgas 39 enthält Kohlendioxid, das mit Hilfe der Anlagenteile 19-25 und 37, 38 aus dem Abgas entfernt und separat weiterverarbeitet wird. Der Kohlendioxidkreislauf 38 befindet sich dabei auf einer deutlich höheren Temperatur als das zum Abhitzekessel 33 strömende Abgas 40. Das Abgas 39 wird nach dem Verlassen der Gasturbine 16 zunächst in einer zweiten Brennkammmer 19, die wie die erste Brennkammer 15 über eine Brennstoffzuführung 17 mit Brennstoff versorgt wird, aufgeheizt. Die damit verbundene Temperaturerhöhung ermöglicht in einem nachfolgenden ersten Wärmetauscher 20 eine ausreichende Wärmeübertragung vom Abgas 39 auf den Kohlendioxidkreislauf 38. Es sei an dieser Stelle angemerkt, dass bei zukünftigen Gasturbinengenerationen mit noch höheren Auslasstemperaturen auf die zweite Brennkammer 19 möglicherweise verzichtet werden kann.The exhaust gas 39 coming from the gas turbine 16 contains carbon dioxide With the help of system parts 19-25 and 37, 38 removed from the exhaust gas and separately is processed further. The carbon dioxide circuit 38 is located on a significantly higher temperature than the exhaust gas 40 flowing to the waste heat boiler 33. The exhaust gas 39 is initially in a after leaving the gas turbine 16 second combustion chamber 19 which, like the first combustion chamber 15, has a Fuel supply 17 is supplied with fuel, heated. The one with it associated temperature increase enables in a subsequent first Heat exchanger 20 sufficient heat transfer from the exhaust gas 39 to the Carbon dioxide cycle 38. It should be noted at this point that in future Second generation gas turbine generations with even higher outlet temperatures Combustion chamber 19 can possibly be dispensed with.

Bevor das Abgas 39 zur Entfernung des Kohlendioxids in einen um eine Drehachse 23 rotierenden, regenerativen Absorber/Desorber 22 eintritt, wird das Abgas 39 in einem zweiten Wärmetauscher 21, der zur weiteren Ueberhitzung des Dampfes im Wasser/Dampf-Kreislauf 12 dient, weiter abgekühlt. Im rotierenden Absorber/Desorber 22 wird das im Abgas 39 enthaltene Kohlendioxid auf einer reaktiven Absorberoberfläche 42 bei einer niedrigeren Temperatur absorbiert, rotiert dann um die Drehachse 23 zur Seite des Kohlendioxidkreislaufs 38 und wird dort bei den erhöhten Temperaturen desorbiert. Durch die rotierenden Bauteile des Absorbers/Desorbers 22 wird jedoch nicht nur Kohlendioxid vom Abgasstrom 39 in den Kohlendioxidkreislauf 38 transportiert, sondern umgekehrt auch Wärme vom Kohlendioxidkreislauf 38 in den Abgasstrom 40. Dieser unerwünschte Wärmetransport kann dadurch begrenzt werden, dass entweder zwischen der reaktiven Oberflächenbeschichtung 42 und dem diese Beschichtung tragenden Trägermaterial (Rotor) 41 eine schlecht wärmeleitende Zwischenschicht 43 angeordnet ist oder das Trägermaterial 41 selbst wärmeisolierend wirkt.Before the exhaust gas 39 for removing the carbon dioxide into one by one Rotary axis 23 rotating, regenerative absorber / desorber 22 occurs, that is Exhaust gas 39 in a second heat exchanger 21, which is used to further overheat the Steam in the water / steam circuit 12 is used, further cooled. In the rotating Absorber / desorber 22, the carbon dioxide contained in the exhaust gas 39 on a absorbing reactive absorber surface 42 at a lower temperature, then rotates about the axis of rotation 23 to the side of the carbon dioxide circuit 38 and is desorbed there at the elevated temperatures. By rotating Components of the absorber / desorber 22 is not only carbon dioxide from Exhaust gas stream 39 transported into the carbon dioxide circuit 38, but vice versa also heat from the carbon dioxide circuit 38 into the exhaust gas stream 40. This unwanted heat transfer can be limited by either between the reactive surface coating 42 and that coating supporting carrier material (rotor) 41 a poorly heat-conducting intermediate layer 43 is arranged or the carrier material 41 itself has a heat-insulating effect.

Während das an Kohlendioxid arme Abgas 40 nach Verlassen des Absorbers/Desorbers 22 zur Wärmerückgewinnung an den Abhitzekessel 33 weitergeleitet wird, wird von dem mittels eines Gebläses 24 im Kohlendioxidkreislauf 38 zirkulierenden Kohlendioxid ein Teilstrom, der dem aus dem Abgas 39 pro Zeiteinheit entfernten Kohlendioxid entspricht, abgezweigt und nach einer Abkühlung in einem weiteren Wärmetauscher 25 über einen Kohlendioxidauslass 37 zur weiteren Verwendung entnommen. Das zirkulierende Kohlendioxid wird im ersten Wärmetauscher 20 aufgeheizt, um im Absorber/Desorber 22 die Desorption in Gang zu halten.During the exhaust gas 40 low in carbon dioxide after leaving the absorber / desorber 22 passed on to the waste heat boiler 33 for heat recovery is by means of a fan 24 in the carbon dioxide circuit 38th circulating carbon dioxide is a partial flow of that from the exhaust 39 per unit time corresponds to removed carbon dioxide, branched off and after cooling in a further heat exchanger 25 via a carbon dioxide outlet 37 taken from further use. The circulating carbon dioxide is in the first Heat exchanger 20 heated to the desorption in the absorber / desorber 22 Keep going.

Der Absorber/Desorber 22 ist vorzugsweise nach Art eines beschichteten Ljungström-Wärmetauschers aufgebaut. Seine wesentlichen Elemente sind eine um eine Drehachse 23 rotierende Trägerstruktur 41, beschichtet mit einem eine grosse Oberfläche aufweisenden Reaktionsmaterial 42 für die Absorption und Desorption von Kohlendioxid und gegebenenfalls einer wärmedämmenden Zwischenschicht 43. Solche Vorrichtungen sind an sich bekannt (siehe z.B. die Druckschriften US-A-3,865,924 oder US-A-5,464,468 oder US-A-4,778,492). The absorber / desorber 22 is preferably coated Ljungström heat exchanger built. Its essential elements are one around a rotation axis 23 rotating support structure 41 coated with a large surface area reaction material 42 for absorption and Desorption of carbon dioxide and possibly an insulating one Intermediate layer 43. Such devices are known per se (see e.g. the Documents US-A-3,865,924 or US-A-5,464,468 or US-A-4,778,492).

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

1010th
KombikraftwerkCombined power plant
1111
GasturbinenanlageGas turbine plant
1212th
Wasser/Dampf-KreislaufWater / steam cycle
13,2813.28
Generatorgenerator
1414
Verdichtercompressor
15,1915.19
BrennkammerCombustion chamber
1616
GasturbineGas turbine
1717th
BrennstoffzuführungFuel supply
1818th
LuftzuführungAir supply
20,21,2520,21,25
WärmetauscherHeat exchanger
2222
Absorber/Desorber (rotierend, regenerativ)Absorber / desorber (rotating, regenerative)
2323
DrehachseAxis of rotation
2424th
Gebläsefan
2626
KondensatpumpeCondensate pump
2727
Kondensatorcapacitor
2929
DampfturbineSteam turbine
3030th
Speisewasserkessel/DeaeratorFeed water boiler / deaerator
3131
SpeisewasserpumpeFeed water pump
3232
DampftrommelSteam drum
3333
Abhitzekessel (HRSG)Waste heat boiler (HRSG)
3434
EconomizerEconomizer
3535
VerdampferEvaporator
3636
UeberhitzerSuperheater
3737
KohlendioxidauslassCarbon dioxide outlet
3838
KohlendioxidkreislaufCarbon dioxide cycle
3939
kohlendioxidreiches Abgasexhaust gas rich in carbon dioxide
4040
kohlendioxidarmes Abgaslow-carbon exhaust gas
4141
Trägermaterial (Rotor)Carrier material (rotor)
4242
absorbierende/desorbierende Beschichtungabsorbent / desorbing coating
4343
wärmedämmende Zwischenschichtinsulating intermediate layer

Claims (12)

Verfahren zum Entfernen von Kohlendioxid aus dem Abgas einer Gasturbinenanlage (11), welches Abgas einem nachgeschalteten Wärmerückgewinnungsprozess (12, 33), vorzugsweise im Abhitzekessel (33) eines Wasser/Dampfkreislaufes (12), unterzogen wird, dadurch gekennzeichnet, dass das Kohlendioxid aus dem Abgas (39) zwischen der Gasturbinenanlage (11) und dem Wärmerückgewinnungsprozess (12, 33) entzogen wird, und dass zum Entfernen des Kohlendioxides ein rotierender, regenerativer Absorber/Desorber (22) verwendet wird, welcher mit seiner Absorberseite in den Abgasstrom (39) und mit seiner Desorberseite in einen Kohlendioxidkreislauf (38) geschaltet ist.Method for removing carbon dioxide from the exhaust gas of a gas turbine system (11), which exhaust gas is subjected to a downstream heat recovery process (12, 33), preferably in the waste heat boiler (33) of a water / steam circuit (12), characterized in that the carbon dioxide from the Exhaust gas (39) is withdrawn between the gas turbine system (11) and the heat recovery process (12, 33), and that a rotating, regenerative absorber / desorber (22) is used to remove the carbon dioxide, which absorber side is used in the exhaust gas stream (39). and is connected with its desorber side to a carbon dioxide circuit (38). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zwischen der Gasturbinenanlage (11) und dem Absorber/Desorber (22) Wärme vom Abgas (39) auf den Kohlendioxidkreislauf (38) übertragen wird.Method according to Claim 1, characterized in that heat is transferred from the exhaust gas (39) to the carbon dioxide circuit (38) between the gas turbine system (11) and the absorber / desorber (22). Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Wärmerückgewinnungsprozess einen Wasser/Dampf-Kreislauf (12) mit einem Abhitzekessel (33) umfasst, und dass das Abgas (39) nach der Wärmeübertragung auf den Kohlendioxidkreislauf (38) und vor dem Eintritt in den Absorber/Desorber (22) zur Ueberhitzung von Dampf im Wasser/Dampf-Kreislauf (12) verwendet wird.A method according to claim 2, characterized in that the heat recovery process comprises a water / steam circuit (12) with a waste heat boiler (33), and that the exhaust gas (39) after the heat transfer to the carbon dioxide circuit (38) and before entering the Absorber / desorber (22) for superheating steam in the water / steam cycle (12) is used. Verfahren nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, dass das Abgas (39) vor der Wärmeübertragung auf den Kohlendioxidkreislauf (38) zusätzlich aufgeheizt wird.Method according to one of claims 2 and 3, characterized in that the exhaust gas (39) is additionally heated before the heat transfer to the carbon dioxide circuit (38). Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass aus dem Kohlendioxidkreislauf (38) ein dem aus dem Abgas entfernten Kohlendioxid entsprechender Teilstrom abgezweigt und anschliessend abgekühlt wird. Method according to one of claims 1 to 4, characterized in that a partial stream corresponding to the carbon dioxide removed from the exhaust gas is branched off from the carbon dioxide circuit (38) and then cooled. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 5, welche Vorrichtung eine Gasturbinenanlage (11) und nachgeschaltete Mittel (12, 33) zur Wärmerückgewinnung aus dem Abgas der Gasturbinenanlage (11) umfasst, dadurch gekennzeichnet, dass zwischen der Gasturbinenanlage (11) und den Wärmerückgewinnungsmitteln (12, 33) ein rotierender, regenerativer Absorber/Desorber (22) angeordnet ist, welcher mit seiner Absorberseite in den Abgasstrom und mit seiner Desorberseite in einen Kohlendioxidkreislauf (38) geschaltet ist.Device for carrying out the method according to one of claims 1 to 5, which device comprises a gas turbine system (11) and downstream means (12, 33) for heat recovery from the exhaust gas of the gas turbine system (11), characterized in that between the gas turbine system (11) and the heat recovery means (12, 33) a rotating, regenerative absorber / desorber (22) is arranged, which is connected with its absorber side in the exhaust gas stream and with its desorber side in a carbon dioxide circuit (38). Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass zwischen der Gasturbinenanlage (11) und dem Absorber/Desorber (22) ein erster Wärmetauscher (20) angeordnet ist, welcher mit dem Kohlendioxidkreislauf (38) in Verbindung steht.Apparatus according to claim 6, characterized in that a first heat exchanger (20) is arranged between the gas turbine system (11) and the absorber / desorber (22) and is connected to the carbon dioxide circuit (38). Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Wärmerückgewinnungsmittel einen Wasser/Dampf-Kreislauf (12) mit einem Abhitzekessel (33) umfassen, und dass zwischen dem ersten Wärmetauscher (20) und dem Absorber/Desorber (22) ein zweiter Wärmetauscher (21) zur Ueberhitzung des Dampfes im Wasser/Dampf-Kreislauf (12) angeordnet ist.Apparatus according to claim 7, characterized in that the heat recovery means comprise a water / steam circuit (12) with a waste heat boiler (33), and in that a second heat exchanger (21) between the first heat exchanger (20) and the absorber / desorber (22) ) is arranged to overheat the steam in the water / steam circuit (12). Vorrichtung nach einem der Ansprüche 7 und 8, dadurch gekennzeichnet, dass vor dem ersten Wärmetauscher (20) eine zusätzliche Mittel (19) zur Aufheizung des Abgases (39) aus der Gasturbinenanlage (11) angeordnet sind.Device according to one of claims 7 and 8, characterized in that an additional means (19) for heating the exhaust gas (39) from the gas turbine system (11) are arranged in front of the first heat exchanger (20). Vorrichtung nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass von dem Kohlendioxidkreislauf (38) ein Kohlendioxidauslass (37) abzweigt, und dass in dem Kohlendioxidauslass (37) ein Wärmetauscher (25) zur Abkühlung des abgezweigten Kohlendioxids angeordnet ist.Device according to one of claims 6 to 9, characterized in that a carbon dioxide outlet (37) branches off from the carbon dioxide circuit (38), and that a heat exchanger (25) for cooling the branched carbon dioxide is arranged in the carbon dioxide outlet (37). Vorrichtung nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass der Absorber/Desorber (22) nach Art eines beschichteten Ljungström-Wärmetauschers aufgebaut und mit einer grossen reaktiven Oberfläche (42) für die Absorption und Desorption von Kohlendioxid ausgestattet ist.Device according to one of claims 6 to 10, characterized in that the absorber / desorber (22) is constructed in the manner of a coated Ljungström heat exchanger and is equipped with a large reactive surface (42) for the absorption and desorption of carbon dioxide. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass zwischen der reaktiven Beschichtung (42) und dem diese Beschichtung tragenden Trägermaterial (41) eine schlecht wärmeleitende Zwischenschicht (43) angeordnet ist.Device according to claim 11, characterized in that a poorly heat-conducting intermediate layer (43) is arranged between the reactive coating (42) and the carrier material (41) carrying this coating.
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US7022168B2 (en) 2006-04-04
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US20010037728A1 (en) 2001-11-08
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CA2342670A1 (en) 2001-09-30
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CA2342670C (en) 2009-10-27

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